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README.md

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 # warmup
 Let's warm up!
+
+## Task
+
+Your task is to implement function, which converts Celsius to Fahrenheit.
+Write your solution in `src/index.js`
+
+## Prepare and test
+
+- Install [Node.js](https://nodejs.org/en/)
+- Clone this repository: `git clone https://github.com/yankouskia/sorter.git`
+- Go to folder `sorter`
+- Run `npm install` in command line
+- Run `npm test` in command line
+- You will see the number of passing and failing tests

package.json

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+{
+  "name": "warmup",
+  "version": "1.0.0",
+  "description": "Let's warm up!",
+  "main": "test.js",
+  "scripts": {
+    "test": "mocha test.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/yankouskia/warmup.git"
+  },
+  "author": "",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/yankouskia/warmup/issues"
+  },
+  "homepage": "https://github.com/yankouskia/warmup#readme",
+  "devDependencies": {
+    "mocha": "^5.0.1"
+  }
+}

src/index.js

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+module.exports = function warmup(temperature) {
+  // your implementation here
+};

test.js

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+const assert = require('assert');
+const warmup = require('./src/index.js');
+
+describe('warmup', () => {
+  it('warm cold', () => {
+    const fahrenheit = warmup(-20);
+    assert.deepEqual(fahrenheit, -4);
+  });
+
+  it('warm cool', () => {
+    const fahrenheit = warmup(0);
+    assert.deepEqual(fahrenheit, 32);
+  });
+
+  it('warm medium', () => {
+    const fahrenheit = warmup(15);
+    assert.deepEqual(fahrenheit, 59);
+  });
+
+  it('warm hot', () => {
+    const fahrenheit = warmup(40);
+    assert.deepEqual(fahrenheit, 104);
+  });
+});